The Oscar winner and her possibly reignited flame got together Monday night for a romantic dinner at the Little Door in West Hollywood, Calif.
Although the duo reportedly called it quits in January, a source tells E! News that Jen and Nicholas were quite close at the restaurant last night, sitting next to each other for a couple of hours and cuddling at a table near the back of the restaurant.
They seemed to be having "a nice time together," one eyewitness said, but also "did seem to want their privacy while they were there."
Jennifer spotted a photographer trying to snap her pic with Nicholas and was, as a result, a little uncomfortable and shy, according to another witness. After dinner, she left through a back door, walking straight to her car with Nicholas.
The twosome, who met filming 2011's X-Men: First Class, then left together, with Jennifer behind the wheel. They're currently filming the sequel, X-Men: Days of Future Past, so it's possible that work has brought the duo back together. No word yet on whether this was just a friendly catch-up or something more.
They do make a cute couple!
—Additional reporting by Baker Machado